Indian equivalents of the following DIY items.

[navin]

yes the veneer is 4mm. it looked like 1.5-2mm at first glance. you are right again! BOY I hate that!!! :-)

[ssSai]

I would like to request every one here for a favour (Just some info needed, not materialistic so dont worry).

I want to complement the subwoofer I am building with a stereo setup (later I dream of making it a home theater).

The choice of the subwoofer,midrange and tweeter, given that I live in India is my first obstacle. I can't keep getting things or waiting for things from abroad. I need to make the best out of what I can get here.

Any advice, help regarding the drivers will be useful.

Also as I had previously posted, I would like to ask you people again on the amplifier/s I can use. A dedicated amp for the sub and another for my stereo/hometheater setup.


AS AN UPDATE TO MY SUBWOOFER CONFIGURATION, I AM GIVING SERIOUS THOUGHT TO GO PORTED. I HAD IN MIND A SEALED CONFIGURATION WHEN I HAD STARTED OFF.

[Vivek]

You can use the TDA (7293/4), STK or the LM chips to make an amp if you are not interested in discrete amps.
Let me know if you stumble upon some good drivers in Bangalore because I am also thinking of building a sub for my HT project.

[ssSai]

Hello Doug!!,

>>That's " mister " Doug to you !!
It seems like the "That's mister ICEMAN to you" from TOP GUN! I watch TOP GUN every month and yet I have the same enthusiasm from the start to finish (Execpt when GOOSE dies).

I am using this "dream" at home and not in a car (I do not have one. Bikes are ones best bet in Bangalore). Check out my thread in diysub..... Many are stressing that I go in for a ported.


Note this fellow DIYers: The name "Dream" is copyrighted to Sai and Sai alone. Later as time passes by and my wallet swells, you will find the Dream range of audio systems by SAI.


*********

Thanks Ajju.

It was very nice of you for the offer. But I plant to check the MDF out in indranagar (its near to my place and MDF is pretty heavy for transportation) and I will tell you what happens. Any way I would really want to know about the jbl and the peerless.

You were talking about the 5" drivers peerless. I had planned to have two 8" and a tweeter on each of the stereo speakers. What is your opinion.

*********

Hi! TCPIP (I wish I knew your name :-))

Araldite is name of a product (glue) as well as the company right? If I want it, I will have to ask for "ARALDITE" or is it "Give me that glue from a company named Araldite".

I would like to know more on the advantages of using lead sheets inside a enclosure.

Regarding the Shiva, I am getting it from Australia (will taka a little more time than I thought). I will difinitely check the URL of Narain you have posted.

*********

Hello Vivek. Will difinitely update you on that.

[Doug]

Mister Sai

I was just looking on the Adire website and it seems that the original Shiva was replaced by the Shiva Mk III version. The EBP ( efficiency bandwidth product ) is approx 50, which would indicate to me that this driver would be best suited in a closed box only.

The formula for finding the EBP is:

EBP = Fs divided by Qes

I also looked at the Shiva white paper for the Mark III and compared it to the white paper I downloaded about 1 year ago for the older Shiva, but the specs seem the same. I'm not sure what the difference is between the two

Does anyone know ??

Mister Doug

[tcpip]

Originally posted by ssSai
Hi! TCPIP (I wish I knew your name :-))

You must've seen I sign my posts as Tarun in DIYAudio.

Araldite is name of a product (glue) as well as the company right? If I want it, I will have to ask for "ARALDITE" or is it "Give me that glue from a company named Araldite".

Araldite is the name of the product. I'm quite certain it's an older invention than sliced bread. I'm now thirty-eight years old, and I've been seeing Araldite being used by my dad at home whenever he had to stick anything "for life", from as far back as I can remember. He says he's seen factories using Araldite by the gallon in the sixties. Araldite is a registered trademark of Vantico AG, Basle, Switzerland. Licensed user (in India): Vantico Performance Polymers Pvt Ltd, Ciba Research Centre, Mumbai. That sort of makes things clear: the Ciba-Geigy chaps have a hand in making/marketing it in India. Ciba too seems to be a Swiss company; check ciba.com.

All this is perhaps more information than you wanted to know. Bottom-line is that you can walk into practically any timber shop (or most stationery shops) in any city/town in India and ask for "Araldite" and you'll get it. Comes in blue cardboard boxes, and a 13gram pack cost me Rs.25. It's as commonly available in India as Fevicol. Like most stick-anything epoxy adhesives, it comes in two tubes. You have to squeeze out equal quantities of goo from both tubes, mix the two pastes thoroughly, and the resultant mixture will stick anything given time (about 12 to 24 hours). It even has its own Website now

I would like to know more on the advantages of using lead sheets inside a enclosure.

You need to make your enclosure walls so inert or heavy or rigid that they don't vibrate with the air pressure when the driver cone moves. Lead being very heavy can be stuck to the walls of the enclosure and can make them heavy enough to not vibrate. Gives you accoustically inert enclosures and thus less harmonic distortion from the speaker as a whole. Can't overemphasise the importance of this specially for you, since you're talking of subwoofers, which have the highest air pressure levels in the enclosure (provided you're not building dipole woofers, which you don't seem to be doing).

Regarding the Shiva, I am getting it from Australia...

Aah... That figures. I got my Jordans from the UK, my friends who have VIfas got them from abroad... ah well. India does not have a local market large enough for any reseller to stock these things, I guess.

Tarun
Oops... that's "Lord TCPIP, Fourteenth Baron of Activecrossovershire, Twice Removed, Member of the Order of the Oscillating BJT" to you. But you can just address me as "Lord Tarun, Sir." I'm very informal that way.

[ssSai]

Hello Tarun!

I completely understand the reason you are using araldite for sticking the veeners. I thought I could do the same when I stick two half inch thick MDF boards. But when a 13g pack costs Rs 25, would that be logical on anyones part to stick the veener using araldite?

I do not know how much area does the mixed paste of araldite cover.

>> Its commonly available in India as fevicol.

This is where I get confused. Fevicol?? (Are you telling me that the white paste which the carpenters use to stick up wood? You get that in liter cans and they do not cost that much when compared to Rs 25/13g.) Would you clarify this please. Cos if you are telling that "fevicol (araldite=fevicol in india) " also has "body" after drying then there is no probs at all.

[ssSai]

Hello Doug.

When the T/S parameters of both Shiva and Shiva MkIII are matching then the EBP should also

match. Then how is it that Shiva went fine wiht ported and the MkIII would not?

Lets check out whether anyone knows more about this. Any way I do not have the spec sheet of

the original Shiva.

[tcpip]

Originally posted by ssSai
But when a 13g pack costs Rs 25, would that be logical on anyones part to stick the veener using araldite?

Larger packs are cheaper, weight for weight. And then the expense of Araldite is small compared to the expense of the total project. When you spend Rs.65/sqft for 25mm thick MDF, and Rs.40/sqft for good wood veneer, you realise that adding Rs.500 more for Araldite is okay. Honest.

>> Its commonly available in India as fevicol.

This is where I get confused. Fevicol??

I am really embarassed at this bloomer. What I wanted to say was "Araldite is as commonly available as Fevicol." You'll usually find Araldite in the same shops which sell Fevicol. Et cetera.

Really sorry for causing this confusion.

And in case there's any residual confusion, please understand that Fevicol has no "body". That's one of the reasons some carpenters love it because it becomes invisible after drying, and soaks into pores of wood, and is more pliable to work with. Araldite has "body."

Tarun

[Doug]

>>When the T/S parameters of both Shiva and Shiva MkIII are matching then the EBP should also

match. Then how is it that Shiva went fine wiht ported and the MkIII would not?<<

Sai:

I just emailed you the Shiva White paper that I had on hand. The last revision date on it is 2001. Actually, I just looked on the Adire website at the White Paper there, and the last revision date on it is also 2001, so it seems that it is in fact the same paper. I'm not sure what changes there are for the Mk III. An email to Adire would probably answer that question. I'm confused or maybe I'm missing something.

Doug